@article{oai:niigata-u.repo.nii.ac.jp:00023254,
 author = {斎藤, 征史 and 加藤, 俊幸 and 丹羽, 正之 and 小越, 和栄},
 issue = {11},
 journal = {新潟医学会雑誌, 新潟医学会雑誌},
 month = {Nov},
 note = {The area mass screening for gallbladder cancer using ultrasonography has been carried out since 1985. Several problems of this mass screening arized and were summarized in this paper. In total, 5209 cases (2368 in 1985 and 2841 in 1986) were examined. As the result of this mass screening, 3 cases with subearly gallbladder cancers (0.07%), 101 cases with gallstones (0.39%) and 39 cases with gallbladder polyps (0.92%) were detected. On the other hand, 28.8% of false positive cases and 3.00% of false negative cases were encountered in this series. The main cause of false positives was the misdiagnosis of the septum of the gallbladder as polyps. To avoid false negative cases, year after year examination should be necessary. Actually, it is very hard to detect early gallbladder cancer from gallbladder polyp or coexistence with gallstone. With this reason, gallbladder polyp more than 10mm in its size and gallstone cases should be operated on. We make it a rule to follow up for every months when the patient refuse surgical operation.},
 pages = {675--678},
 title = {6) 胆道検診の現状(シンポジウム がん集団検診の現況と問題点, 第425回新潟医学会)},
 volume = {102},
 year = {1988}
}